mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-12-13 08:54:55 +01:00
191 lines
7.3 KiB
Python
191 lines
7.3 KiB
Python
"""Subset of inspect module from upstream python
|
|
|
|
We use this instead of upstream because upstream inspect is slow to import, and
|
|
significantly contributes to numpy import times. Importing this copy has almost
|
|
no overhead.
|
|
|
|
"""
|
|
import types
|
|
|
|
__all__ = ['getargspec', 'formatargspec']
|
|
|
|
# ----------------------------------------------------------- type-checking
|
|
def ismethod(object):
|
|
"""Return true if the object is an instance method.
|
|
|
|
Instance method objects provide these attributes:
|
|
__doc__ documentation string
|
|
__name__ name with which this method was defined
|
|
im_class class object in which this method belongs
|
|
im_func function object containing implementation of method
|
|
im_self instance to which this method is bound, or None
|
|
|
|
"""
|
|
return isinstance(object, types.MethodType)
|
|
|
|
def isfunction(object):
|
|
"""Return true if the object is a user-defined function.
|
|
|
|
Function objects provide these attributes:
|
|
__doc__ documentation string
|
|
__name__ name with which this function was defined
|
|
func_code code object containing compiled function bytecode
|
|
func_defaults tuple of any default values for arguments
|
|
func_doc (same as __doc__)
|
|
func_globals global namespace in which this function was defined
|
|
func_name (same as __name__)
|
|
|
|
"""
|
|
return isinstance(object, types.FunctionType)
|
|
|
|
def iscode(object):
|
|
"""Return true if the object is a code object.
|
|
|
|
Code objects provide these attributes:
|
|
co_argcount number of arguments (not including * or ** args)
|
|
co_code string of raw compiled bytecode
|
|
co_consts tuple of constants used in the bytecode
|
|
co_filename name of file in which this code object was created
|
|
co_firstlineno number of first line in Python source code
|
|
co_flags bitmap: 1=optimized | 2=newlocals | 4=*arg | 8=**arg
|
|
co_lnotab encoded mapping of line numbers to bytecode indices
|
|
co_name name with which this code object was defined
|
|
co_names tuple of names of local variables
|
|
co_nlocals number of local variables
|
|
co_stacksize virtual machine stack space required
|
|
co_varnames tuple of names of arguments and local variables
|
|
|
|
"""
|
|
return isinstance(object, types.CodeType)
|
|
|
|
# ------------------------------------------------ argument list extraction
|
|
# These constants are from Python's compile.h.
|
|
CO_OPTIMIZED, CO_NEWLOCALS, CO_VARARGS, CO_VARKEYWORDS = 1, 2, 4, 8
|
|
|
|
def getargs(co):
|
|
"""Get information about the arguments accepted by a code object.
|
|
|
|
Three things are returned: (args, varargs, varkw), where 'args' is
|
|
a list of argument names (possibly containing nested lists), and
|
|
'varargs' and 'varkw' are the names of the * and ** arguments or None.
|
|
|
|
"""
|
|
|
|
if not iscode(co):
|
|
raise TypeError('arg is not a code object')
|
|
|
|
nargs = co.co_argcount
|
|
names = co.co_varnames
|
|
args = list(names[:nargs])
|
|
|
|
# The following acrobatics are for anonymous (tuple) arguments.
|
|
# Which we do not need to support, so remove to avoid importing
|
|
# the dis module.
|
|
for i in range(nargs):
|
|
if args[i][:1] in ['', '.']:
|
|
raise TypeError("tuple function arguments are not supported")
|
|
varargs = None
|
|
if co.co_flags & CO_VARARGS:
|
|
varargs = co.co_varnames[nargs]
|
|
nargs = nargs + 1
|
|
varkw = None
|
|
if co.co_flags & CO_VARKEYWORDS:
|
|
varkw = co.co_varnames[nargs]
|
|
return args, varargs, varkw
|
|
|
|
def getargspec(func):
|
|
"""Get the names and default values of a function's arguments.
|
|
|
|
A tuple of four things is returned: (args, varargs, varkw, defaults).
|
|
'args' is a list of the argument names (it may contain nested lists).
|
|
'varargs' and 'varkw' are the names of the * and ** arguments or None.
|
|
'defaults' is an n-tuple of the default values of the last n arguments.
|
|
|
|
"""
|
|
|
|
if ismethod(func):
|
|
func = func.__func__
|
|
if not isfunction(func):
|
|
raise TypeError('arg is not a Python function')
|
|
args, varargs, varkw = getargs(func.__code__)
|
|
return args, varargs, varkw, func.__defaults__
|
|
|
|
def getargvalues(frame):
|
|
"""Get information about arguments passed into a particular frame.
|
|
|
|
A tuple of four things is returned: (args, varargs, varkw, locals).
|
|
'args' is a list of the argument names (it may contain nested lists).
|
|
'varargs' and 'varkw' are the names of the * and ** arguments or None.
|
|
'locals' is the locals dictionary of the given frame.
|
|
|
|
"""
|
|
args, varargs, varkw = getargs(frame.f_code)
|
|
return args, varargs, varkw, frame.f_locals
|
|
|
|
def joinseq(seq):
|
|
if len(seq) == 1:
|
|
return '(' + seq[0] + ',)'
|
|
else:
|
|
return '(' + ', '.join(seq) + ')'
|
|
|
|
def strseq(object, convert, join=joinseq):
|
|
"""Recursively walk a sequence, stringifying each element.
|
|
|
|
"""
|
|
if type(object) in [list, tuple]:
|
|
return join([strseq(_o, convert, join) for _o in object])
|
|
else:
|
|
return convert(object)
|
|
|
|
def formatargspec(args, varargs=None, varkw=None, defaults=None,
|
|
formatarg=str,
|
|
formatvarargs=lambda name: '*' + name,
|
|
formatvarkw=lambda name: '**' + name,
|
|
formatvalue=lambda value: '=' + repr(value),
|
|
join=joinseq):
|
|
"""Format an argument spec from the 4 values returned by getargspec.
|
|
|
|
The first four arguments are (args, varargs, varkw, defaults). The
|
|
other four arguments are the corresponding optional formatting functions
|
|
that are called to turn names and values into strings. The ninth
|
|
argument is an optional function to format the sequence of arguments.
|
|
|
|
"""
|
|
specs = []
|
|
if defaults:
|
|
firstdefault = len(args) - len(defaults)
|
|
for i in range(len(args)):
|
|
spec = strseq(args[i], formatarg, join)
|
|
if defaults and i >= firstdefault:
|
|
spec = spec + formatvalue(defaults[i - firstdefault])
|
|
specs.append(spec)
|
|
if varargs is not None:
|
|
specs.append(formatvarargs(varargs))
|
|
if varkw is not None:
|
|
specs.append(formatvarkw(varkw))
|
|
return '(' + ', '.join(specs) + ')'
|
|
|
|
def formatargvalues(args, varargs, varkw, locals,
|
|
formatarg=str,
|
|
formatvarargs=lambda name: '*' + name,
|
|
formatvarkw=lambda name: '**' + name,
|
|
formatvalue=lambda value: '=' + repr(value),
|
|
join=joinseq):
|
|
"""Format an argument spec from the 4 values returned by getargvalues.
|
|
|
|
The first four arguments are (args, varargs, varkw, locals). The
|
|
next four arguments are the corresponding optional formatting functions
|
|
that are called to turn names and values into strings. The ninth
|
|
argument is an optional function to format the sequence of arguments.
|
|
|
|
"""
|
|
def convert(name, locals=locals,
|
|
formatarg=formatarg, formatvalue=formatvalue):
|
|
return formatarg(name) + formatvalue(locals[name])
|
|
specs = [strseq(arg, convert, join) for arg in args]
|
|
|
|
if varargs:
|
|
specs.append(formatvarargs(varargs) + formatvalue(locals[varargs]))
|
|
if varkw:
|
|
specs.append(formatvarkw(varkw) + formatvalue(locals[varkw]))
|
|
return '(' + ', '.join(specs) + ')'
|